Add config property for reusing jacoco data files #19707
Merged
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This is to allow aggregating coverage results from
multiple test JVMs, for example when using the Surefire
property reuseForks = false
JaCoCo itself has configuration settings to allow
appending coverage data to an existing file (which is
its default behaviour).
The Quarkus default behaviour is unchanged (the jacoco
data file is deleted before each run).